Fluid-brake for guns



No. 664,089. Patented Dec. I8, I900. J. KRONE.

FLUID BRAKE FOB GUNS.

[Application filed Apr. 16, 1900. (No Model.)

JoHANN-E -K N "or nssEN,

GERMANY, As'srcnon SAME PLACE.

Fries.

To FRIED. KRUPP, 0F,

' FLuio-saAKsroR cure:

SPECIFICATION-forming pm of Letters Patent No. 664,089, dated. December 18, 1900.

animus an April is,

To all whom it concern: Be it known that I, J OHANNES KRONE, en-

gineer, a citizen of the German Empire, re

siding at 56 Bismarckstrasse, Essen-owthe- Ruhr, Germany, have invented certain new and useful lmprovemen'tsin Fl uid-Brakes for Guns, of which the following is a specification.

My invention refers to imp rovements in fluid-brakes for guns of the 'class describedin my application for Letters Patent, Serial No. 6,790, filed February 28, 1900. I In such brakes the volume of liquid contained between the recoil-piston and the running-out piston or pistons is apt to be reduced by leakage, and

the loss nthst from time to time be made up by pumping in liquid. 'The object of my present invention is to arrange a liquid-supply pump taking but little space and protected against pieces of bursting shells, but accessible, simple, and always ready for use.

For this purpose my invention consists, es-

sentially, in .forming the head of one of the cylinders as a storage vessel for the brake liquid and arranging the supply-pu mp within this vessel.

My invention will be best understood by referenceto the annexed drawings, showing one form of apparatus, in which- Figure l is a longitudinal section of a fluidbrake embodying my invention; and Fig. 2,

a longitudinal section of the pump, showing the plunger at about half-stroke.

Similar letters of reference designate corresponding parts throughout both .views of the drawings.

In the drawings the letter A designates the regoil-cylinder, B its piston, and Q the pistonro F is the running-out cylinder, made in one piece with the recoil-eylinderand containing the piston K, which bears against a spiral spring J ,which at the other end abuts against the bottom I of the cylinder F. G is the head of the running-(int cylinder.-

Ihe piston K consistsjof a hollow cylinder k, rovided with one or more tapering or "curved slits N, 'parallel to the axis or spirally arranged, and with a ipacking-nut The connection between the recoilcylinder A and 1900. smart). 12,979. (No mam.

the running-out cylinder F made through an openingM and an annular channel L in the running-out cylinder.

The space within therecoil-cylinder A bethe piston-rod G, the passage-M, the annular .ss tween the piston B and the stuffing-box of channel L, the slits N, and the spaces between the closed end of the piston K, the. running-out-cylinder head G, and the vessel T, described below, arefilled withliqnid,

"while the spaces between the piston B and the head 'opposi tethe stufiing-box of the piston-rod C. and between the piston K andthe cylinder bottom I are by preference connected to the'outer air. The wedgeshaped slits-N graduallycheck the passage of the liquid from the brake-cylinder to the running-out cylinder.

To the head G of therunning-out cylinder F is secured a tubular storage vessel T for liquid. It is of smaller outside diameter than the inside of the hollow piston K, the connection, as shown, being made by a threaded part V.- .The cylinder-head G has a central tubular projection D,which serves as a pumpcylinder and extends into a socket U, projecting from the bottom of the storage vessel.

E is the piston of the pump, and Hthe piston-rod, which passes through a stuffingbox O. A button P is attachedto the outer end of the piston-rod H and is provided with a threaded part Q, Fig. 2. The cylinder-head G has a central bore with a threaded part. S, into which the threaded .part Q of the button P screws, as shown in Fig. 1, whereby the pump is well secured within the storage vessel. The strong bottom of this storage .vessel T forms the valve-chamber containingthe suction-valve W and the discharge-valve X.,

The valve-chamber is directly connected to the socket U; also, by the suction-port Y to the interior of the storage vessel T and by the discharge-port Z to the interior of the running-out'cylinder F. The valves are inserted through the discharge-port Z, which is partly closed by a perforated screw-plug s. For

filling the storage vessel '1 a screw-plug f is I providedin the cylinder-head G. When liquid is to be pumped into the running-out cylinder, the knob P is screwed outby means- -of a key, when the pump isoperated by hand.

For the purpose of examining the valves the head G is unscrewed and removedfrom the running-out cylinder, together with the storage vessel T, when after removingthe screwplug 8 the valves can be taken out.

Instead of inserting the pump and storage vessel into the running-out cylinder they might without essential changes be inserted into the recoil-cylinder. Two running-out cylinders may be used, one on each side of the recoil-cylinder, or one running-out cylinder between two recoil cylinders.

I do not in this application claim the relati ve arrangement of the recoil-cylinder and of the running-out cylinder.

What I claim as new is I 1. In a fluid-brake for guns of the character specified, the combination with the recoil running-out cylinders, of a storage ve'ssel attached to the head of one of the cylinders and projecting into said cylinder, and a pump placed within the storage vessel and adapted to be operated from the exterior, so as to draw liquid from the storage vessel and discharge itinto the liquidspace of the brake, substantially as described.

2. In a fluid-brake for guns of the character specified, the combination with the communicating reooiland running-out cylinders, of a storage vessel attached to the head of one of the cylinders and projecting into the pie ton of said cylinder, and a'puinp placed with in the storage vessel and adapted to be operated from the exterion'so as to draw liquid from the storage vessel the liquid-space of the brake, substantially as described. V

3. In a fluid-brake for guns of the character specified, the combination with the head G of the running-out cylinder, of a liquid-4o storage vessel T screwed into or otherwise secured to the head, said vessel being of J OHANNES KRONE.

Witnesses:

WILLIAM ESSENWEIN, EMIL HOETTE.

and discharge it into 3 5 the storage 5o 

